JSFiddle - React, Tailwind, and code Playground
HTML
<html>
<head>
</head>
<body>
<a href="#" class="packeta-selector-open">Choose pickup point</a>
<div class="packeta-selector-branch-name"></div>
<div class="packeta-selector-branch-id"></div>
<input type="text" class="packeta-selector-branch-id"></div>
<script src="https://widget.packeta.com/www/js/packetaWidget.js" data-api-key="61a07521d27f2c32"></script>
</body>
</html>
JavaScript
$('.packeta-selector-branch-id').on('change', function () { alert('helo'); })